Bala Madhu, Rehana Shaik, Singh Mohini Prabha
Department of Floriculture and Landscaping, Punjab Agricultural University, Ludhiana, Punjab, 141 004, India.
J Plant Res. 2023 Sep;136(5):587-612. doi: 10.1007/s10265-023-01480-6. Epub 2023 Jul 15.
Asteraceae (synonym as Compositae) is one of the largest angiosperm families among flowering plants comprising one-tenth of all agri-horticultural species grown across various habitats except in Antarctica. These are commercially utilized as cut and loose flowers as well as pot and bedding plants in landscape gardens due to their unique floral traits. Consequently, ineffective seed setting and presence of an intraspecific reproductive barrier known as self-incompatibility (SI) severely reduces the effectiveness of hybridization and self-fertilization by traditional crossing. There have been very few detailed studies of pollen-stigma interactions in this family. Moreover, about 63% of Aster species can barely self-fertilize due to self-incompatibility (SI). The chrysanthemum (Chrysanthemum × morifolium) is one of the most economically important ornamental plants in the Asteraceae family which hugely shows incompatibility. Reasons for the low fertility and reproductive capacity of species are still indefinite or not clear. Hence, the temporal pattern of inheritance of self-incompatibility and its effect on reproductive biology needs to be investigated further to improve the breeding efficiency. This review highlights the self-incompatible (SI) system operating in important Astraceous (ornamental) crops which are adversely affected by this mechanism along with different physiological and molecular techniques involved in breaking down self-incompatibility.
菊科（同义词为菊科）是开花植物中最大的被子植物科之一，占除南极洲外各种生境中种植的所有农业园艺物种的十分之一。由于其独特的花卉特征，这些植物在商业上被用作切花和散花，以及景观花园中的盆栽和花坛植物。因此，无效的种子结实以及存在一种称为自交不亲和（SI）的种内生殖障碍，严重降低了传统杂交的杂交和自花受精效率。对该科花粉-柱头相互作用的详细研究很少。此外，由于自交不亲和（SI），约63%的紫菀属物种几乎不能自花受精。菊花（Chrysanthemum × morifolium）是菊科中最重要的经济观赏植物之一，极易表现出不亲和性。物种育性和繁殖能力低的原因仍然不明确。因此，需要进一步研究自交不亲和的遗传时间模式及其对生殖生物学的影响，以提高育种效率。本综述重点介绍了在重要的菊科（观赏）作物中运行的自交不亲和（SI）系统，该系统受到这种机制的不利影响，以及涉及打破自交不亲和的不同生理和分子技术。
